CN203701972U - Hybrid mono-cone bit - Google Patents
Hybrid mono-cone bit Download PDFInfo
- Publication number
- CN203701972U CN203701972U CN201420014479.XU CN201420014479U CN203701972U CN 203701972 U CN203701972 U CN 203701972U CN 201420014479 U CN201420014479 U CN 201420014479U CN 203701972 U CN203701972 U CN 203701972U
- Authority
- CN
- China
- Prior art keywords
- tooth
- cone
- bit
- drill bit
- rotary drill
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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Abstract
The utility model discloses a hybrid mono-cone bit, and belongs to the field of drilling. The hybrid mono-cone bit comprises a palm and a cone. Teeth for breaking rock are embedded in the surface of the cone. The hybrid mono-cone bit is characterized in that the intersection point P of the extension line of the back of the palm and the extension line of the inclined face of a journal is lower than the tooth crest of the teeth of the cone, a tooth arrangement face is machined at the bottom of the palm, and cutting elements are installed on the tooth arrangement face. The hybrid mono-cone bit has the advantages that the teeth on the cone and the cutting elements on the palm are used together for breaking rock at the bottom of a well, and rock can be broken through one drill bit in a fixed mode or a cone mode; the hybrid mono-cone bit is simple and reliable in structure, the number and the positions of cutting elements on the palm and the difference between the height of the exposed portions of the cutting elements and the height of the exposed portions of the teeth on the cone can be flexibly designed so as to meet the requirements for drilling into different stratums, rock breaking efficiency is improved to the maximum, and the service life of the hybrid mono-cone bit is prolonged to the maximum; meanwhile, the palm extends into the bottom of the well to occupy the area, not covered with the cone, of the bottom of the well, and therefore the hybrid mono-cone bit becomes a packed hole drill bit, and the improvement on stability of the hybrid mono-cone bit is facilitated.
Description
Technical field
The utility model relates to petroleum gas, mine engineering, the hydrology and geological prospecting drilling equipment field, relates to specifically a kind of hybrid single-cone rotary drill bit.
Background technology
In drilling well, conventional drill bit has two classes.One class is rock bit, and another kind of is diamond bit.In rock bit, there are again tricone bit, two rock bit, single-cone rotary drill bit.In diamond bit, there are PDC drill bit, impregnated bit etc.Rock bit is the impact to stratum and scraping fractured rock by tooth, is applicable to soft or hard and replaces stratum, and stratum is adapted to better, and its shortcoming is the easy to wear and fracture of tooth, and the life-span is lower.PDC drill bit is by diamond compact to stratum shearing-crushing rock, and stock-removing efficiency is high, and suitable broken homogeneous formation, has higher rate of penetration and life-span.Due to rock bit motion mode be different from PDC drill bit, can not directly PDC composite sheet be arranged on gear wheel and be used as cutting teeth.For many years, the structure of rock bit is that main cutting tooth is arranged on gear wheel, be positioned at gear wheel small end central area, the broken shaft bottom of cutting teeth, be positioned at the large end cutting teeth cutting borehole wall of gear wheel and exterior zone, shaft bottom.Bit leg pawl point is on shaft bottom, and the space of cutting teeth not being installed at pawl point place, can only be at mounting portion, bit leg top gauge teeth, this bit leg structures shape bit leg only play a part to support gear wheel, can not play brokenly rock effect.Drill bit design and user are devoted to diamond for rock bit, to expect to improve efficiency of breaking rock and the life-span of drill bit.People once replaced to the carbide cutting tooth on gear wheel the hard-metal insert that diamond is strengthened, but this tooth is also because of cause for quality and the higher not generally employing in rock bit of cost.The form of structure of rock bit does not have too large variation for many years, has limited the use in the rock bit of Diamond Cutting element.
Only have at present spherical single-cone rotary drill bit to use in oil field.Spherical single-cone rotary drill bit relies on tooth scraping fractured rock in shaft bottom, the webbed Cutting trajectory of shape, in soft formation, there are higher rate of penetration and life-span, but hard formation and abrasiveness doughtily in layer due to carbide alloy tooth serious wear in advance, average rate of penetration and the life-span of drill bit are lower, and the expansion that has affected single-cone rotary drill bit is used.
Summary of the invention
The purpose of this utility model is: propose a kind of new bit leg form, combine with single cone structure, form a kind of hybrid single-cone rotary drill bit.This drill bit had both adopted the broken rock mode of PDC drill bit, had adopted again the broken rock mode of rock bit, thus efficiency of breaking rock and the application life of having improved drill bit.
The technical solution of the utility model is as follows:
A kind of hybrid single-cone rotary drill bit, comprises a bit leg and a gear wheel, and gear wheel surface is installed with the tooth in order to fractured rock.It is characterized in that: the intersection point P of bit leg palm back of the body extended line and axle journal inclined-plane extended line is in height lower than all gear wheel tooth tooth tops, and at the bit leg bottom processing one cloth flank of tooth, the scope of cloth flank of tooth area S is
wherein D is bit diameter; Insert or welding cutting element on the cloth flank of tooth, with the common broken bottom rock of tooth on gear wheel.
Feature of the present utility model comprises:
(1) the cloth flank of tooth be shaped as cone of revolution or curved surface, gyroaxis is bit center.
(2), when drill bit movement, exterior zone, Teeth-cutting shaft bottom and the borehole wall at gear wheel small end position, play gauge effect; The central area, Teeth-cutting shaft bottom of position, the large end of gear wheel.
(3) cloth flank of tooth cutting element enveloping surface profile bus and gear wheel addendum envelope profile bus with respect to drill axis symmetry or gear wheel addendum envelope profile bus than the low 1～10mm of cloth flank of tooth cutting element enveloping surface profile bus.
As preferably, cutting element can be PDC tooth, diamond composite teeth, impregnated with diamond tooth.
The beneficial effects of the utility model: cutting element is installed on the bit leg cloth flank of tooth and is formed stationary cutting structure, as PDC drill bit sample fractured rock, can assist gear wheel upper teeth fractured rock.On a drill bit, realize the broken rock of PDC drill bit and first two mode of rotary drill.So not only combined two kinds of drill bits advantage but also the near shortcoming of having mended.Drill bit structure is simple and reliable, number and the position of cutting element on can flexible design bit leg, and the proud exposure of the proud exposure of cutting element and gear wheel upper teeth is poor, to meet the needs that creep into Different Strata, farthest improve efficiency of breaking rock and tooth life; Meanwhile, bit leg prolongs Shen to shaft bottom, and the cloth flank of tooth has occupied the well bottom zone not covered by gear wheel, makes drill bit become one and meet the eye on every side drill bit, is conducive to improve the stability of drill bit.
Accompanying drawing explanation
Fig. 1 is hybrid single-cone rotary drill bit structural representation of the present utility model;
The view of Fig. 2 when to be structure shown in Fig. 1 overlook (contrary drill bit drilling direction) along drill axis;
Fig. 3 is the schematic diagram of the bit leg cloth flank of tooth;
Fig. 4 is the schematic diagram of the intersection point P of bit leg palm back of the body extended line and axle journal inclined-plane extended line;
Schematic diagram when Fig. 5 is tooth addendum envelope profile bus and cloth flank of tooth cutting element enveloping surface profile bus symmetry;
Fig. 6 is the schematic diagram of tooth addendum envelope profile bus during than the low H of cloth flank of tooth cutting element enveloping surface profile bus;
The specific embodiment
Below in conjunction with specific embodiments and the drawings, the utility model is further described.
Embodiment 1:
As shown in Figure 1, 2, this single-cone rotary drill bit is mainly made up of bit leg 1 and gear wheel 2, has bit sub 3 on bit leg, axle journal etc. 4.Gear wheel 2 is assemblied on axle journal 4, and can flexible rotating.On gear wheel, be installed with the tooth 5 of energy fractured rock; The intersection point P on the bit leg palm back of the body and axle journal inclined-plane, in height lower than gear wheel tooth tooth top, at the bit leg bottom processing one cloth flank of tooth 6, welds cutting element 7 on the cloth flank of tooth.
The cloth flank of tooth 6 be shaped as cone of revolution, gyroaxis is bit center 8.
When drill bit movement, exterior zone, Teeth-cutting shaft bottom and the borehole wall at gear wheel small end position, play gauge effect; The central area, Teeth-cutting shaft bottom of position, the large end of gear wheel.
After drill bit installation, gear wheel upper teeth addendum envelope profile bus 9 and cloth flank of tooth cutting element enveloping surface profile bus 10 are with respect to drill axis 8 symmetries, as shown in Figure 5
As preferably, cutting element 7 can be PDC tooth, diamond composite teeth, impregnated with diamond tooth.
Embodiment 2:
After drill bit installation, if by tooth 5 addendum envelope profile buses 9 after bit center 8 Rotate 180s °, bus 9 is expressed as line segment 11.Line segment 11 is compared with cloth flank of tooth cutting element 7 enveloping surface profile buses 10, and in height, line segment 11 is than cloth flank of tooth cutting element 7 enveloping surface profile bus 10 low H, and H span is 1～10mm, as shown in Figure 6.Drill bit, in the time of broken rock, is extruded a series of broken holes in shaft bottom by the tooth 5 on gear wheel, then cut by PDC tooth 7 phacolith that broken hole exceeds around, can improve like this efficiency of breaking rock of drill bit.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (8)
1. a single-cone rotary drill bit, comprise a bit leg (1) and a gear wheel (2), gear wheel (2) surface is installed with the tooth (5) in order to fractured rock, it is characterized in that: the intersection point P of described bit leg (1) palm back of the body extended line and axle journal inclined-plane extended line is in height lower than described tooth (5) tooth top; Bit leg (1) the bottom processing cloth flank of tooth (6), the scope of the area S of the described cloth flank of tooth (6) is
the diameter that wherein D is described single-cone rotary drill bit; The upper cutting element (7) of installing of the cloth flank of tooth (6), with the common broken bottom rock of tooth (5).
2. single-cone rotary drill bit as claimed in claim 1, is characterized in that: the described cloth flank of tooth (6) be shaped as cone of revolution or surface of revolution, gyroaxis is described single-cone rotary drill bit center of rotation (8).
3. single-cone rotary drill bit as claimed in claim 1, is characterized in that: when drill bit movement, and exterior zone, Teeth-cutting shaft bottom and the borehole wall at described gear wheel (2) small end position, the central area, Teeth-cutting shaft bottom of position, large end.
4. single-cone rotary drill bit as claimed in claim 1, is characterized in that: described cutting element (7) enveloping surface profile bus (10) and tooth (5) addendum envelope profile bus (9) are with respect to bit center (8) symmetry.
5. single-cone rotary drill bit as claimed in claim 1, it is characterized in that: described tooth (5) addendum envelope profile bus (9) is after center of rotation (8) Rotate 180 °, compare with cutting element (7) enveloping surface profile bus (10), described tooth (5) addendum envelope profile bus (9) is in height than the low H of described cutting element (7) enveloping surface profile bus (10), and H span is 1<H<10mm.
6. single-cone rotary drill bit as claimed in claim 1, is characterized in that: described cutting element (7) is PDC composite sheet.
7. single-cone rotary drill bit as claimed in claim 1, is characterized in that: described cutting element (7) is diamond composite teeth.
8. single-cone rotary drill bit as claimed in claim 1, is characterized in that: described cutting element (7) is impregnated with diamond tooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420014479.XU CN203701972U (en) | 2014-01-10 | 2014-01-10 | Hybrid mono-cone bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420014479.XU CN203701972U (en) | 2014-01-10 | 2014-01-10 | Hybrid mono-cone bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203701972U true CN203701972U (en) | 2014-07-09 |
Family
ID=51052428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420014479.XU Withdrawn - After Issue CN203701972U (en) | 2014-01-10 | 2014-01-10 | Hybrid mono-cone bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203701972U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758458A (en) * | 2014-01-10 | 2014-04-30 | 西南石油大学 | Hybrid single-cone drill bit |
-
2014
- 2014-01-10 CN CN201420014479.XU patent/CN203701972U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758458A (en) * | 2014-01-10 | 2014-04-30 | 西南石油大学 | Hybrid single-cone drill bit |
| CN103758458B (en) * | 2014-01-10 | 2015-12-30 | 西南石油大学 | A kind of hybrid single-cone rotary drill bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140709 Effective date of abandoning: 20151230 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |